git.sur5r.net Git - openldap/blob - servers/slapd/sasl.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <ac/stdlib.h>
  11 #include <ac/string.h>
  12
  13 #include <lber.h>
  14 #include <ldap_log.h>
  15
  16 #include "slap.h"
  17
  18 #ifdef HAVE_CYRUS_SASL
  19 #include <limits.h>
  20
  21 #ifdef HAVE_SASL_SASL_H
  22 #include <sasl/sasl.h>
  23 #else
  24 #include <sasl.h>
  25 #endif
  26
  27 #if SASL_VERSION_MAJOR >= 2
  28 #include <lutil.h>
  29 #include <sasl/saslplug.h>
  30 #define SASL_CONST const
  31 #else
  32 #define SASL_CONST
  33 #endif
  34
  35 #include <ldap_pvt.h>
  36
  37 #ifdef SLAPD_SPASSWD
  38 #include <lutil.h>
  39 #endif
  40
  41 /* Flags for telling slap_sasl_getdn() what type of identity is being passed */
  42 #define FLAG_GETDN_AUTHCID 2
  43 #define FLAG_GETDN_AUTHZID 4
  44
  45 static sasl_security_properties_t sasl_secprops;
  46
  47 int slap_sasl_config( int cargc, char **cargv, char *line,
  48         const char *fname, int lineno )
  49 {
  50                 /* set SASL proxy authorization policy */
  51                 if ( strcasecmp( cargv[0], "sasl-authz-policy" ) == 0 ) {
  52                         if ( cargc != 2 ) {
  53 #ifdef NEW_LOGGING
  54                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
  55                                            "%s: line %d: missing policy in \"sasl-authz-policy <policy>\" line\n",
  56                                            fname, lineno ));
  57 #else
  58                                 Debug( LDAP_DEBUG_ANY,
  59             "%s: line %d: missing policy in \"sasl-authz-policy <policy>\" line\n",
  60                                     fname, lineno, 0 );
  61 #endif
  62
  63                                 return( 1 );
  64                         }
  65                         if ( slap_sasl_setpolicy( cargv[1] ) ) {
  66 #ifdef NEW_LOGGING
  67                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
  68                                            "%s: line %d: unable "
  69                                            "to parse value \"%s\" "
  70                                            "in \"sasl-authz-policy "
  71                                            "<policy>\" line.\n",
  72                                            fname, lineno, cargv[1] ));
  73 #else
  74                                 Debug( LDAP_DEBUG_ANY,
  75                                         "%s: line %d: unable "
  76                                         "to parse value \"%s\" "
  77                                         "in \"sasl-authz-policy "
  78                                         "<policy>\" line\n",
  79                                         fname, lineno, cargv[1] );
  80 #endif
  81                                 return( 1 );
  82                         }
  83
  84
  85                 /* set SASL host */
  86                 } else if ( strcasecmp( cargv[0], "sasl-host" ) == 0 ) {
  87                         if ( cargc < 2 ) {
  88 #ifdef NEW_LOGGING
  89                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
  90                                            "%s: line %d: missing host in \"sasl-host <host>\" line\n",
  91                                            fname, lineno ));
  92 #else
  93                                 Debug( LDAP_DEBUG_ANY,
  94             "%s: line %d: missing host in \"sasl-host <host>\" line\n",
  95                                     fname, lineno, 0 );
  96 #endif
  97
  98                                 return( 1 );
  99                         }
 100
 101                         if ( global_host != NULL ) {
 102 #ifdef NEW_LOGGING
 103                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 104                                            "%s: line %d: already set sasl-host!\n",
 105                                            fname, lineno ));
 106 #else
 107                                 Debug( LDAP_DEBUG_ANY,
 108                                         "%s: line %d: already set sasl-host!\n",
 109                                         fname, lineno, 0 );
 110 #endif
 111
 112                                 return 1;
 113
 114                         } else {
 115                                 global_host = ch_strdup( cargv[1] );
 116                         }
 117
 118                 /* set SASL realm */
 119                 } else if ( strcasecmp( cargv[0], "sasl-realm" ) == 0 ) {
 120                         if ( cargc < 2 ) {
 121 #ifdef NEW_LOGGING
 122                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 123                                            "%s: line %d: missing realm in \"sasl-realm <realm>\" line.\n",
 124                                            fname, lineno ));
 125 #else
 126                                 Debug( LDAP_DEBUG_ANY,
 127             "%s: line %d: missing realm in \"sasl-realm <realm>\" line\n",
 128                                     fname, lineno, 0 );
 129 #endif
 130
 131                                 return( 1 );
 132                         }
 133
 134                         if ( global_realm != NULL ) {
 135 #ifdef NEW_LOGGING
 136                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 137                                            "%s: line %d: already set sasl-realm!\n",
 138                                            fname, lineno ));
 139 #else
 140                                 Debug( LDAP_DEBUG_ANY,
 141                                         "%s: line %d: already set sasl-realm!\n",
 142                                         fname, lineno, 0 );
 143 #endif
 144
 145                                 return 1;
 146
 147                         } else {
 148                                 global_realm = ch_strdup( cargv[1] );
 149                         }
 150
 151                 } else if ( !strcasecmp( cargv[0], "sasl-regexp" )
 152                         || !strcasecmp( cargv[0], "saslregexp" ) )
 153                 {
 154                         int rc;
 155                         if ( cargc != 3 ) {
 156 #ifdef NEW_LOGGING
 157                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 158                                            "%s: line %d: need 2 args in "
 159                                            "\"saslregexp <match> <replace>\"\n",
 160                                            fname, lineno ));
 161 #else
 162                                 Debug( LDAP_DEBUG_ANY,
 163                                 "%s: line %d: need 2 args in \"saslregexp <match> <replace>\"\n",
 164                                     fname, lineno, 0 );
 165 #endif
 166
 167                                 return( 1 );
 168                         }
 169                         rc = slap_sasl_regexp_config( cargv[1], cargv[2] );
 170                         if ( rc ) {
 171                                 return rc;
 172                         }
 173
 174                 /* SASL security properties */
 175                 } else if ( strcasecmp( cargv[0], "sasl-secprops" ) == 0 ) {
 176                         char *txt;
 177
 178                         if ( cargc < 2 ) {
 179 #ifdef NEW_LOGGING
 180                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 181                                            "%s: line %d: missing flags in "
 182                                            "\"sasl-secprops <properties>\" line\n",
 183                                            fname, lineno ));
 184 #else
 185                                 Debug( LDAP_DEBUG_ANY,
 186             "%s: line %d: missing flags in \"sasl-secprops <properties>\" line\n",
 187                                     fname, lineno, 0 );
 188 #endif
 189
 190                                 return 1;
 191                         }
 192
 193                         txt = slap_sasl_secprops( cargv[1] );
 194                         if ( txt != NULL ) {
 195 #ifdef NEW_LOGGING
 196                                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 197                                            "%s: line %d sasl-secprops: %s\n",
 198                                            fname, lineno, txt ));
 199 #else
 200                                 Debug( LDAP_DEBUG_ANY,
 201             "%s: line %d: sasl-secprops: %s\n",
 202                                     fname, lineno, txt );
 203 #endif
 204
 205                                 return 1;
 206                         }
 207             }
 208
 209             return LDAP_SUCCESS;
 210 }
 211
 212 static int
 213 slap_sasl_log(
 214         void *context,
 215         int priority,
 216         const char *message)
 217 {
 218         Connection *conn = context;
 219         int level;
 220         const char * label;
 221
 222         if ( message == NULL ) {
 223                 return SASL_BADPARAM;
 224         }
 225
 226         switch (priority) {
 227 #if SASL_VERSION_MAJOR >= 2
 228         case SASL_LOG_NONE:
 229                 level = LDAP_DEBUG_NONE;
 230                 label = "None";
 231                 break;
 232         case SASL_LOG_ERR:
 233                 level = LDAP_DEBUG_ANY;
 234                 label = "Error";
 235                 break;
 236         case SASL_LOG_FAIL:
 237                 level = LDAP_DEBUG_ANY;
 238                 label = "Failure";
 239                 break;
 240         case SASL_LOG_WARN:
 241                 level = LDAP_DEBUG_TRACE;
 242                 label = "Warning";
 243                 break;
 244         case SASL_LOG_NOTE:
 245                 level = LDAP_DEBUG_TRACE;
 246                 label = "Notice";
 247                 break;
 248         case SASL_LOG_DEBUG:
 249                 level = LDAP_DEBUG_TRACE;
 250                 label = "Debug";
 251                 break;
 252         case SASL_LOG_TRACE:
 253                 level = LDAP_DEBUG_TRACE;
 254                 label = "Trace";
 255                 break;
 256         case SASL_LOG_PASS:
 257                 level = LDAP_DEBUG_TRACE;
 258                 label = "Password Trace";
 259                 break;
 260 #else
 261         case SASL_LOG_ERR:
 262                 level = LDAP_DEBUG_ANY;
 263                 label = "Error";
 264                 break;
 265         case SASL_LOG_WARNING:
 266                 level = LDAP_DEBUG_TRACE;
 267                 label = "Warning";
 268                 break;
 269         case SASL_LOG_INFO:
 270                 level = LDAP_DEBUG_TRACE;
 271                 label = "Info";
 272                 break;
 273 #endif
 274         default:
 275                 return SASL_BADPARAM;
 276         }
 277
 278 #ifdef NEW_LOGGING
 279         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 280                 "SASL [conn=%ld] %s: %s\n",
 281                 conn ? conn->c_connid : -1,
 282                 label, message ));
 283 #else
 284         Debug( level, "SASL [conn=%ld] %s: %s\n",
 285                 conn ? conn->c_connid: -1,
 286                 label, message );
 287 #endif
 288
 289
 290         return SASL_OK;
 291 }
 292
 293
 294 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
 295    string returned in *dn is in its own allocated memory, and must be free'd
 296    by the calling process.
 297    -Mark Adamson, Carnegie Mellon
 298
 299    The "dn:" prefix is no longer used anywhere inside slapd. It is only used
 300    on strings passed in directly from SASL.
 301    -Howard Chu, Symas Corp.
 302 */
 303
 304 #define SET_DN  1
 305 #define SET_U   2
 306
 307 static struct berval ext_bv = { sizeof("EXTERNAL")-1, "EXTERNAL" };
 308
 309 int slap_sasl_getdn( Connection *conn, char *id, int len,
 310         char *user_realm, struct berval *dn, int flags )
 311 {
 312         char *c1;
 313         int rc, is_dn = 0, do_norm = 1;
 314         sasl_conn_t *ctx;
 315         struct berval dn2;
 316
 317 #ifdef NEW_LOGGING
 318         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 319                 "slap_sasl_getdn: conn %d id=%s\n",
 320                 conn ? conn->c_connid : -1,
 321                 id ? (*id ? id : "<empty>") : "NULL" ));
 322 #else
 323         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
 324       id?(*id?id:"<empty>"):"NULL",0,0 );
 325 #endif
 326
 327         dn->bv_val = NULL;
 328         dn->bv_len = 0;
 329
 330         if ( id ) {
 331                 if ( len == 0 ) len = strlen( id );
 332
 333                 /* Blatantly anonymous ID */
 334                 if ( len == sizeof("anonymous") - 1 &&
 335                         !strcasecmp( id, "anonymous" ) ) {
 336                         return( LDAP_SUCCESS );
 337                 }
 338         } else {
 339                 len = 0;
 340         }
 341
 342         ctx = conn->c_sasl_context;
 343
 344         /* An authcID needs to be converted to authzID form. Set the
 345          * values directly into *dn; they will be normalized later. (and
 346          * normalizing always makes a new copy.) An ID from a TLS certificate
 347          * is already normalized, so copy it and skip normalization.
 348          */
 349         if( flags & FLAG_GETDN_AUTHCID ) {
 350 #ifdef HAVE_TLS
 351                 if( conn->c_is_tls && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
 352                         && ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 ) ) {
 353                         /* X.509 DN is already normalized */
 354                         do_norm = 0;
 355                         is_dn = SET_DN;
 356                         ber_str2bv( id, len, 1, dn );
 357
 358                 } else
 359 #endif
 360                 {
 361                         /* convert to u:<username> form */
 362                         is_dn = SET_U;
 363                         dn->bv_val = id;
 364                         dn->bv_len = len;
 365                 }
 366         }
 367         if( !is_dn ) {
 368                 if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
 369                         is_dn = SET_U;
 370                         dn->bv_val = id+2;
 371                         dn->bv_len = len-2;
 372                 } else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
 373                         is_dn = SET_DN;
 374                         dn->bv_val = id+3;
 375                         dn->bv_len = len-3;
 376                 }
 377         }
 378
 379         /* No other possibilities from here */
 380         if( !is_dn ) {
 381                 dn->bv_val = NULL;
 382                 dn->bv_len = 0;
 383                 return( LDAP_INAPPROPRIATE_AUTH );
 384         }
 385
 386         /* Username strings */
 387         if( is_dn == SET_U ) {
 388                 char *p, *realm;
 389                 len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
 390
 391                 /* username may have embedded realm name */
 392                 if( realm = strchr( dn->bv_val, '@') ) {
 393                         *realm++ = '\0';
 394                         len += sizeof(",cn=")-2;
 395                 } else if( user_realm && *user_realm ) {
 396                         len += strlen( user_realm ) + sizeof(",cn=")-1;
 397                 }
 398
 399                 if( conn->c_sasl_bind_mech.bv_len ) {
 400                         len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
 401                 }
 402
 403                 /* Build the new dn */
 404                 c1 = dn->bv_val;
 405                 dn->bv_val = ch_malloc( len+1 );
 406                 p = slap_strcopy( dn->bv_val, "uid=" );
 407                 p = slap_strncopy( p, c1, dn->bv_len );
 408
 409                 if( realm ) {
 410                         int rlen = dn->bv_len - ( realm - c1 );
 411                         p = slap_strcopy( p, ",cn=" );
 412                         p = slap_strncopy( p, realm, rlen );
 413                         realm[-1] = '@';
 414                 } else if( user_realm && *user_realm ) {
 415                         p = slap_strcopy( p, ",cn=" );
 416                         p = slap_strcopy( p, user_realm );
 417                 }
 418
 419                 if( conn->c_sasl_bind_mech.bv_len ) {
 420                         p = slap_strcopy( p, ",cn=" );
 421                         p = slap_strcopy( p, conn->c_sasl_bind_mech.bv_val );
 422                 }
 423                 p = slap_strcopy( p, ",cn=auth" );
 424                 dn->bv_len = p - dn->bv_val;
 425
 426 #ifdef NEW_LOGGING
 427                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 428                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val ));
 429 #else
 430                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
 431 #endif
 432         }
 433
 434         /* All strings are in DN form now. Normalize if needed. */
 435         if ( do_norm ) {
 436                 rc = dnNormalize2( NULL, dn, &dn2 );
 437
 438                 /* User DNs were constructed above and must be freed now */
 439                 if ( is_dn == SET_U )
 440                         ch_free( dn->bv_val );
 441
 442                 if ( rc != LDAP_SUCCESS ) {
 443                         dn->bv_val = NULL;
 444                         dn->bv_len = 0;
 445                         return rc;
 446                 }
 447                 *dn = dn2;
 448         }
 449
 450         /* Run thru regexp */
 451         slap_sasl2dn( conn, dn, &dn2 );
 452         if( dn2.bv_val ) {
 453                 ch_free( dn->bv_val );
 454                 *dn = dn2;
 455 #ifdef NEW_LOGGING
 456                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 457                         "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val ));
 458 #else
 459                 Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
 460                         dn->bv_val, 0, 0 );
 461 #endif
 462         }
 463
 464         return( LDAP_SUCCESS );
 465 }
 466
 467 #if SASL_VERSION_MAJOR >= 2
 468 static const char *slap_propnames[] = { "*authcDN", "*authzDN", NULL };
 469
 470 static void
 471 slap_auxprop_lookup(
 472         void *glob_context,
 473         sasl_server_params_t *sparams,
 474         unsigned flags,
 475         const char *user,
 476         unsigned ulen)
 477 {
 478         int rc, i, last;
 479         struct berval dn;
 480         const struct propval *list;
 481         BerVarray vals, bv;
 482         AttributeDescription *ad;
 483         const char *text;
 484
 485         list = sparams->utils->prop_get( sparams->propctx );
 486
 487         /* Find our DN first */
 488         for( i = 0, last = 0; list[i].name; i++ ) {
 489                 if ( list[i].name[0] == '*' ) {
 490                         if ( (flags & SASL_AUXPROP_AUTHZID) &&
 491                                 !strcmp( list[i].name, slap_propnames[1] ) ) {
 492                                 if ( list[i].values && list[i].values[0] )
 493                                         AC_MEMCPY( &dn, list[i].values[0], sizeof( dn ) );
 494                                 if ( !last ) last = i;
 495                                 break;
 496                         }
 497                         if ( !strcmp( list[i].name, slap_propnames[0] ) ) {
 498                                 if ( !last ) last = i;
 499                                 if ( list[i].values && list[i].values[0] ) {
 500                                         AC_MEMCPY( &dn, list[i].values[0], sizeof( dn ) );
 501                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 502                                                 break;
 503                                 }
 504                         }
 505                 }
 506         }
 507
 508         /* Now fetch the rest */
 509         for( i = 0; i < last; i++ ) {
 510                 const char *name = list[i].name;
 511
 512                 if ( name[0] == '*' ) {
 513                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 514                         name++;
 515                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 516                         continue;
 517
 518                 if ( list[i].values ) {
 519                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 520                         sparams->utils->prop_erase( sparams->propctx, list[i].name );
 521                 }
 522                 ad = NULL;
 523                 rc = slap_str2ad( name, &ad, &text );
 524                 if ( rc != LDAP_SUCCESS ) {
 525 #ifdef NEW_LOGGING
 526                         LDAP_LOG(( "sasl", LDAP_LEVEL_DETAIL1,
 527                                 "slap_auxprop: str2ad(%s): %s\n", name, text ));
 528 #else
 529                         Debug( LDAP_DEBUG_TRACE,
 530                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 531 #endif
 532                         rc = slap_str2undef_ad( name, &ad, &text );
 533                         if ( rc != LDAP_SUCCESS ) continue;
 534                 }
 535                 rc = backend_attribute( NULL,NULL,NULL,NULL, &dn, ad, &vals );
 536                 if ( rc != LDAP_SUCCESS ) continue;
 537                 for ( bv = vals; bv->bv_val; bv++ ) {
 538                         sparams->utils->prop_set( sparams->propctx, list[i].name,
 539                                 bv->bv_val, bv->bv_len );
 540                 }
 541                 ber_bvarray_free( vals );
 542         }
 543 }
 544
 545 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 546         0,      /* Features */
 547         0,      /* spare */
 548         NULL,   /* glob_context */
 549         NULL,   /* auxprop_free */
 550         slap_auxprop_lookup,
 551         "slapd",        /* name */
 552         NULL    /* spare */
 553 };
 554
 555 static int
 556 slap_auxprop_init(
 557         const sasl_utils_t *utils,
 558         int max_version,
 559         int *out_version,
 560         sasl_auxprop_plug_t **plug,
 561         const char *plugname)
 562 {
 563         if ( !out_version | !plug ) return SASL_BADPARAM;
 564
 565         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 566
 567         *out_version = SASL_AUXPROP_PLUG_VERSION;
 568         *plug = &slap_auxprop_plugin;
 569         return SASL_OK;
 570 }
 571
 572 static int
 573 slap_sasl_checkpass(
 574         sasl_conn_t *sconn,
 575         void *context,
 576         const char *username,
 577         const char *pass,
 578         unsigned passlen,
 579         struct propctx *propctx)
 580 {
 581         Connection *conn = (Connection *)context;
 582         struct berval dn, cred;
 583         int rc;
 584         BerVarray vals, bv;
 585
 586         cred.bv_val = (char *)pass;
 587         cred.bv_len = passlen;
 588
 589         /* SASL will fallback to its own mechanisms if we don't
 590          * find an answer here.
 591          */
 592
 593         rc = slap_sasl_getdn( conn, (char *)username, 0, NULL, &dn,
 594                 FLAG_GETDN_AUTHCID );
 595         if ( rc != LDAP_SUCCESS ) {
 596                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 597                 return SASL_NOUSER;
 598         }
 599
 600         if ( dn.bv_len == 0 ) {
 601                 sasl_seterror( sconn, 0,
 602                         "No password is associated with the Root DSE" );
 603                 if ( dn.bv_val != NULL ) {
 604                         ch_free( dn.bv_val );
 605                 }
 606                 return SASL_NOUSER;
 607         }
 608
 609         rc = backend_attribute( NULL, NULL, NULL, NULL, &dn,
 610                 slap_schema.si_ad_userPassword, &vals);
 611         if ( rc != LDAP_SUCCESS ) {
 612                 ch_free( dn.bv_val );
 613                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 614                 return SASL_NOVERIFY;
 615         }
 616
 617         rc = SASL_NOVERIFY;
 618
 619         if ( vals != NULL ) {
 620                 for ( bv = vals; bv->bv_val != NULL; bv++ ) {
 621                         if ( !lutil_passwd( bv, &cred, NULL ) ) {
 622                                 rc = SASL_OK;
 623                                 break;
 624                         }
 625                 }
 626                 ber_bvarray_free( vals );
 627         }
 628
 629         if ( rc != SASL_OK ) {
 630                 sasl_seterror( sconn, 0,
 631                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 632         }
 633
 634         ch_free( dn.bv_val );
 635
 636         return rc;
 637 }
 638
 639 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 640  * auxiliary property, so that we can refer to it in sasl_authorize
 641  * without interfering with anything else. Also, the SASL username
 642  * buffer is constrained to 256 characters, and our DNs could be
 643  * much longer (totally arbitrary length)...
 644  */
 645 static int
 646 slap_sasl_canonicalize(
 647         sasl_conn_t *sconn,
 648         void *context,
 649         const char *in,
 650         unsigned inlen,
 651         unsigned flags,
 652         const char *user_realm,
 653         char *out,
 654         unsigned out_max,
 655         unsigned *out_len)
 656 {
 657         Connection *conn = (Connection *)context;
 658         struct propctx *props = sasl_auxprop_getctx( sconn );
 659         struct propval auxvals[3];
 660         struct berval dn;
 661         int rc, which;
 662         const char *names[2];
 663
 664         *out_len = 0;
 665
 666 #ifdef NEW_LOGGING
 667         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 668                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 669                         conn ? conn->c_connid : -1,
 670                         (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 671                         in ? in : "<empty>" ));
 672 #else
 673         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 674                 "%s=\"%s\"\n",
 675                         conn ? conn->c_connid : -1,
 676                         (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 677                         in ? in : "<empty>" );
 678 #endif
 679
 680         /* If name is too big, just truncate. We don't care, we're
 681          * using DNs, not the usernames.
 682          */
 683         if ( inlen > out_max )
 684                 inlen = out_max-1;
 685
 686         /* See if we need to add request, can only do it once */
 687         prop_getnames( props, slap_propnames, auxvals );
 688         if ( !auxvals[0].name )
 689                 prop_request( props, slap_propnames );
 690
 691         if ( flags & SASL_CU_AUTHID )
 692                 which = 0;
 693         else
 694                 which = 1;
 695
 696         /* Already been here? */
 697         if ( auxvals[which].values )
 698                 goto done;
 699
 700         if ( flags == SASL_CU_AUTHZID ) {
 701         /* If we got unqualified authzid's, they probably came from SASL
 702          * itself just passing the authcid to us. Look inside the oparams
 703          * structure to see if that's true. (HACK: the out_len pointer is
 704          * the address of a member of a sasl_out_params_t structure...)
 705          */
 706                 sasl_out_params_t dummy;
 707                 int offset = (void *)&dummy.ulen - (void *)&dummy.authid;
 708                 char **authid = (void *)out_len - offset;
 709                 if ( *authid && !strcmp( in, *authid ) )
 710                         goto done;
 711         }
 712
 713         rc = slap_sasl_getdn( conn, (char *)in, inlen, (char *)user_realm, &dn,
 714                 (flags & SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
 715         if ( rc != LDAP_SUCCESS ) {
 716                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 717                 return SASL_NOAUTHZ;
 718         }
 719
 720         names[0] = slap_propnames[which];
 721         names[1] = NULL;
 722
 723         prop_set( props, names[0], (char *)&dn, sizeof( dn ) );
 724
 725 #ifdef NEW_LOGGING
 726         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 727                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 728                         conn ? conn->c_connid : -1,
 729                         names[0]+1, dn.bv_val ));
 730 #else
 731         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 732                 "%s=\"%s\"\n",
 733                         conn ? conn->c_connid : -1,
 734                         names[0]+1, dn.bv_val );
 735 #endif
 736 done:   AC_MEMCPY( out, in, inlen );
 737         out[inlen] = '\0';
 738
 739         *out_len = inlen;
 740
 741         return SASL_OK;
 742 }
 743
 744 static int
 745 slap_sasl_authorize(
 746         sasl_conn_t *sconn,
 747         void *context,
 748         char *requested_user,
 749         unsigned rlen,
 750         char *auth_identity,
 751         unsigned alen,
 752         const char *def_realm,
 753         unsigned urlen,
 754         struct propctx *props)
 755 {
 756         Connection *conn = (Connection *)context;
 757         struct propval auxvals[3];
 758         struct berval authcDN, authzDN;
 759         int rc;
 760
 761 #ifdef NEW_LOGGING
 762         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 763                 "slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
 764                         conn ? conn->c_connid : -1, auth_identity, requested_user));
 765 #else
 766         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 767                 "authcid=\"%s\" authzid=\"%s\"\n",
 768                 conn ? conn->c_connid : -1, auth_identity, requested_user );
 769 #endif
 770         if ( conn->c_sasl_dn.bv_val ) {
 771                 ch_free( conn->c_sasl_dn.bv_val );
 772                 conn->c_sasl_dn.bv_val = NULL;
 773                 conn->c_sasl_dn.bv_len = 0;
 774         }
 775
 776         prop_getnames( props, slap_propnames, auxvals );
 777
 778         AC_MEMCPY( &authcDN, auxvals[0].values[0], sizeof(authcDN) );
 779
 780         /* Nothing to do if no authzID was given */
 781         if ( !auxvals[1].name || !auxvals[1].values ) {
 782                 conn->c_sasl_dn = authcDN;
 783                 return SASL_OK;
 784         }
 785
 786         AC_MEMCPY( &authzDN, auxvals[1].values[0], sizeof(authzDN) );
 787
 788         rc = slap_sasl_authorized( &authcDN, &authzDN );
 789         ch_free( authcDN.bv_val );
 790         if ( rc != LDAP_SUCCESS ) {
 791 #ifdef NEW_LOGGING
 792                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 793                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 794                            (long)(conn ? conn->c_connid : -1), rc ));
 795 #else
 796                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 797                         " authorization disallowed (%d)\n",
 798                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 799 #endif
 800
 801                 sasl_seterror( sconn, 0, "not authorized" );
 802                 ch_free( authzDN.bv_val );
 803                 return SASL_NOAUTHZ;
 804         }
 805
 806         conn->c_sasl_dn = authzDN;
 807
 808 #ifdef NEW_LOGGING
 809         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 810                    "slap_sasl_authorize: conn %d authorization allowed\n",
 811                    (long)(conn ? conn->c_connid : -1 ) ));
 812 #else
 813         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 814                 " authorization allowed\n",
 815                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 816 #endif
 817         return SASL_OK;
 818 }
 819 #else
 820 static int
 821 slap_sasl_authorize(
 822         void *context,
 823         char *authcid,
 824         char *authzid,
 825         const char **user,
 826         const char **errstr)
 827 {
 828         struct berval authcDN, authzDN;
 829         int rc;
 830         Connection *conn = context;
 831         char *realm;
 832
 833         *user = NULL;
 834         if ( conn->c_sasl_dn.bv_val ) {
 835                 ch_free( conn->c_sasl_dn.bv_val );
 836                 conn->c_sasl_dn.bv_val = NULL;
 837                 conn->c_sasl_dn.bv_len = 0;
 838         }
 839
 840 #ifdef NEW_LOGGING
 841         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 842                    "slap_sasl_authorize: conn %d         authcid=\"%s\" authzid=\"%s\"\n",
 843                    conn ? conn->c_connid : -1,
 844                    authcid ? authcid : "<empty>",
 845                    authzid ? authzid : "<empty>" ));
 846 #else
 847         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 848                 "authcid=\"%s\" authzid=\"%s\"\n",
 849                 (long) (conn ? conn->c_connid : -1),
 850                 authcid ? authcid : "<empty>",
 851                 authzid ? authzid : "<empty>" );
 852 #endif
 853
 854         /* Figure out how much data we have for the dn */
 855         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 856         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 857 #ifdef NEW_LOGGING
 858                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 859                         "slap_sasl_authorize: getprop(REALM) failed.\n" ));
 860 #else
 861                 Debug(LDAP_DEBUG_TRACE,
 862                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 863 #endif
 864                 *errstr = "Could not extract realm";
 865                 return SASL_NOAUTHZ;
 866         }
 867
 868         /* Convert the identities to DN's. If no authzid was given, client will
 869            be bound as the DN matching their username */
 870         rc = slap_sasl_getdn( conn, (char *)authcid, 0, realm, &authcDN, FLAG_GETDN_AUTHCID );
 871         if( rc != LDAP_SUCCESS ) {
 872                 *errstr = ldap_err2string( rc );
 873                 return SASL_NOAUTHZ;
 874         }
 875         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 876 #ifdef NEW_LOGGING
 877                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 878                            "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 879                            conn ? conn->c_connid : -1, authcDN.bv_val ));
 880 #else
 881                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 882                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 883 #endif
 884
 885                 conn->c_sasl_dn = authcDN;
 886                 *errstr = NULL;
 887                 return SASL_OK;
 888         }
 889         rc = slap_sasl_getdn( conn, (char *)authzid, 0, realm, &authzDN, FLAG_GETDN_AUTHZID );
 890         if( rc != LDAP_SUCCESS ) {
 891                 ch_free( authcDN.bv_val );
 892                 *errstr = ldap_err2string( rc );
 893                 return SASL_NOAUTHZ;
 894         }
 895
 896         rc = slap_sasl_authorized( &authcDN, &authzDN );
 897         ch_free( authcDN.bv_val );
 898         if( rc ) {
 899 #ifdef NEW_LOGGING
 900                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 901                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 902                            (long)(conn ? conn->c_connid : -1), rc ));
 903 #else
 904                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 905                         " authorization disallowed (%d)\n",
 906                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 907 #endif
 908
 909                 *errstr = "not authorized";
 910                 ch_free( authzDN.bv_val );
 911                 return SASL_NOAUTHZ;
 912         }
 913
 914 #ifdef NEW_LOGGING
 915         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 916                    "slap_sasl_authorize: conn %d authorization allowed\n",
 917                    (long)(conn ? conn->c_connid : -1 ) ));
 918 #else
 919         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 920                 " authorization allowed\n",
 921                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 922 #endif
 923
 924         conn->c_sasl_dn = authzDN;
 925         *errstr = NULL;
 926         return SASL_OK;
 927 }
 928 #endif /* SASL_VERSION_MAJOR >= 2 */
 929
 930 static int
 931 slap_sasl_err2ldap( int saslerr )
 932 {
 933         int rc;
 934
 935         switch (saslerr) {
 936                 case SASL_CONTINUE:
 937                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 938                         break;
 939                 case SASL_FAIL:
 940                         rc = LDAP_OTHER;
 941                         break;
 942                 case SASL_NOMEM:
 943                         rc = LDAP_OTHER;
 944                         break;
 945                 case SASL_NOMECH:
 946                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 947                         break;
 948                 case SASL_BADAUTH:
 949                         rc = LDAP_INVALID_CREDENTIALS;
 950                         break;
 951                 case SASL_NOAUTHZ:
 952                         rc = LDAP_INSUFFICIENT_ACCESS;
 953                         break;
 954                 case SASL_TOOWEAK:
 955                 case SASL_ENCRYPT:
 956                         rc = LDAP_INAPPROPRIATE_AUTH;
 957                         break;
 958                 default:
 959                         rc = LDAP_OTHER;
 960                         break;
 961         }
 962
 963         return rc;
 964 }
 965 #endif
 966
 967
 968 int slap_sasl_init( void )
 969 {
 970 #ifdef HAVE_CYRUS_SASL
 971         int rc;
 972         static sasl_callback_t server_callbacks[] = {
 973                 { SASL_CB_LOG, &slap_sasl_log, NULL },
 974                 { SASL_CB_LIST_END, NULL, NULL }
 975         };
 976
 977         sasl_set_alloc(
 978                 ch_malloc,
 979                 ch_calloc,
 980                 ch_realloc,
 981                 ch_free );
 982
 983         sasl_set_mutex(
 984                 ldap_pvt_sasl_mutex_new,
 985                 ldap_pvt_sasl_mutex_lock,
 986                 ldap_pvt_sasl_mutex_unlock,
 987                 ldap_pvt_sasl_mutex_dispose );
 988
 989 #if SASL_VERSION_MAJOR >= 2
 990         sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
 991 #endif
 992         /* should provide callbacks for logging */
 993         /* server name should be configurable */
 994         rc = sasl_server_init( server_callbacks, "slapd" );
 995
 996         if( rc != SASL_OK ) {
 997 #ifdef NEW_LOGGING
 998                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 999                            "slap_sasl_init: init failed.\n" ));
1000 #else
1001                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
1002                         0, 0, 0 );
1003 #endif
1004
1005                 return -1;
1006         }
1007
1008 #ifdef NEW_LOGGING
1009         LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
1010                    "slap_sasl_init: initialized!\n"));
1011 #else
1012         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1013                 0, 0, 0 );
1014 #endif
1015
1016
1017         /* default security properties */
1018         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1019         sasl_secprops.max_ssf = INT_MAX;
1020         sasl_secprops.maxbufsize = 65536;
1021         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1022 #endif
1023
1024         return 0;
1025 }
1026
1027 int slap_sasl_destroy( void )
1028 {
1029 #ifdef HAVE_CYRUS_SASL
1030         sasl_done();
1031 #endif
1032         free( global_host );
1033         global_host = NULL;
1034
1035         return 0;
1036 }
1037
1038 int slap_sasl_open( Connection *conn )
1039 {
1040         int cb, sc = LDAP_SUCCESS;
1041 #if SASL_VERSION_MAJOR >= 2
1042         char *ipremoteport = NULL, *iplocalport = NULL;
1043 #endif
1044
1045 #ifdef HAVE_CYRUS_SASL
1046         sasl_conn_t *ctx = NULL;
1047         sasl_callback_t *session_callbacks;
1048
1049         assert( conn->c_sasl_context == NULL );
1050         assert( conn->c_sasl_extra == NULL );
1051
1052         conn->c_sasl_layers = 0;
1053
1054         session_callbacks =
1055 #if SASL_VERSION_MAJOR >= 2
1056                 ch_calloc( 5, sizeof(sasl_callback_t));
1057 #else
1058                 ch_calloc( 3, sizeof(sasl_callback_t));
1059 #endif
1060         conn->c_sasl_extra = session_callbacks;
1061
1062         session_callbacks[cb=0].id = SASL_CB_LOG;
1063         session_callbacks[cb].proc = &slap_sasl_log;
1064         session_callbacks[cb++].context = conn;
1065
1066         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1067         session_callbacks[cb].proc = &slap_sasl_authorize;
1068         session_callbacks[cb++].context = conn;
1069
1070 #if SASL_VERSION_MAJOR >= 2
1071         session_callbacks[cb].id = SASL_CB_CANON_USER;
1072         session_callbacks[cb].proc = &slap_sasl_canonicalize;
1073         session_callbacks[cb++].context = conn;
1074
1075         /* XXXX: this should be conditional */
1076         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
1077         session_callbacks[cb].proc = &slap_sasl_checkpass;
1078         session_callbacks[cb++].context = conn;
1079 #endif
1080
1081         session_callbacks[cb].id = SASL_CB_LIST_END;
1082         session_callbacks[cb].proc = NULL;
1083         session_callbacks[cb++].context = NULL;
1084
1085         if( global_host == NULL ) {
1086                 global_host = ldap_pvt_get_fqdn( NULL );
1087         }
1088
1089         /* create new SASL context */
1090 #if SASL_VERSION_MAJOR >= 2
1091         if ( conn->c_sock_name.bv_len != 0 &&
1092              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
1093                 char *p;
1094
1095                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
1096                 /* Convert IPv6 addresses to address;port syntax. */
1097                 p = strrchr( iplocalport, ' ' );
1098                 /* Convert IPv4 addresses to address;port syntax. */
1099                 if ( p == NULL ) p = strchr( iplocalport, ':' );
1100                 if ( p != NULL ) {
1101                         *p = ';';
1102                 }
1103         }
1104         if ( conn->c_peer_name.bv_len != 0 &&
1105              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
1106                 char *p;
1107
1108                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
1109                 /* Convert IPv6 addresses to address;port syntax. */
1110                 p = strrchr( ipremoteport, ' ' );
1111                 /* Convert IPv4 addresses to address;port syntax. */
1112                 if ( p == NULL ) p = strchr( ipremoteport, ':' );
1113                 if ( p != NULL ) {
1114                         *p = ';';
1115                 }
1116         }
1117         sc = sasl_server_new( "ldap", global_host, global_realm,
1118                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
1119         if ( iplocalport != NULL ) {
1120                 ch_free( iplocalport );
1121         }
1122         if ( ipremoteport != NULL ) {
1123                 ch_free( ipremoteport );
1124         }
1125 #else
1126         sc = sasl_server_new( "ldap", global_host, global_realm,
1127                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
1128 #endif
1129
1130         if( sc != SASL_OK ) {
1131 #ifdef NEW_LOGGING
1132                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1133                            "slap_sasl_open: sasl_server_new failed: %d\n", sc ));
1134 #else
1135                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1136                         sc, 0, 0 );
1137 #endif
1138
1139                 return -1;
1140         }
1141
1142         conn->c_sasl_context = ctx;
1143
1144         if( sc == SASL_OK ) {
1145                 sc = sasl_setprop( ctx,
1146                         SASL_SEC_PROPS, &sasl_secprops );
1147
1148                 if( sc != SASL_OK ) {
1149 #ifdef NEW_LOGGING
1150                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1151                                    "slap_sasl_open: sasl_setprop failed: %d \n", sc ));
1152 #else
1153                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1154                                 sc, 0, 0 );
1155 #endif
1156
1157                         slap_sasl_close( conn );
1158                         return -1;
1159                 }
1160         }
1161
1162         sc = slap_sasl_err2ldap( sc );
1163 #endif
1164         return sc;
1165 }
1166
1167 int slap_sasl_external(
1168         Connection *conn,
1169         slap_ssf_t ssf,
1170         const char *auth_id )
1171 {
1172 #if SASL_VERSION_MAJOR >= 2
1173         int sc;
1174         sasl_conn_t *ctx = conn->c_sasl_context;
1175
1176         if ( ctx == NULL ) {
1177                 return LDAP_UNAVAILABLE;
1178         }
1179
1180         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1181
1182         if ( sc != SASL_OK ) {
1183                 return LDAP_OTHER;
1184         }
1185
1186         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
1187
1188         if ( sc != SASL_OK ) {
1189                 return LDAP_OTHER;
1190         }
1191
1192 #elif defined(HAVE_CYRUS_SASL)
1193         int sc;
1194         sasl_conn_t *ctx = conn->c_sasl_context;
1195         sasl_external_properties_t extprops;
1196
1197         if ( ctx == NULL ) {
1198                 return LDAP_UNAVAILABLE;
1199         }
1200
1201         memset( &extprops, '\0', sizeof(extprops) );
1202         extprops.ssf = ssf;
1203         extprops.auth_id = (char *) auth_id;
1204
1205         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1206                 (void *) &extprops );
1207
1208         if ( sc != SASL_OK ) {
1209                 return LDAP_OTHER;
1210         }
1211 #endif
1212
1213         return LDAP_SUCCESS;
1214 }
1215
1216 int slap_sasl_reset( Connection *conn )
1217 {
1218 #ifdef HAVE_CYRUS_SASL
1219         sasl_conn_t *ctx = conn->c_sasl_context;
1220
1221         if( ctx != NULL ) {
1222         }
1223 #endif
1224         /* must return "anonymous" */
1225         return LDAP_SUCCESS;
1226 }
1227
1228 char ** slap_sasl_mechs( Connection *conn )
1229 {
1230         char **mechs = NULL;
1231
1232 #ifdef HAVE_CYRUS_SASL
1233         sasl_conn_t *ctx = conn->c_sasl_context;
1234
1235         if( ctx != NULL ) {
1236                 int sc;
1237                 SASL_CONST char *mechstr;
1238
1239                 sc = sasl_listmech( ctx,
1240                         NULL, NULL, ",", NULL,
1241                         &mechstr, NULL, NULL );
1242
1243                 if( sc != SASL_OK ) {
1244 #ifdef NEW_LOGGING
1245                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1246                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
1247 #else
1248                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1249                                 sc, 0, 0 );
1250 #endif
1251
1252                         return NULL;
1253                 }
1254
1255                 mechs = str2charray( mechstr, "," );
1256
1257 #if SASL_VERSION_MAJOR < 2
1258                 ch_free( mechstr );
1259 #endif
1260         }
1261 #endif
1262
1263         return mechs;
1264 }
1265
1266 int slap_sasl_close( Connection *conn )
1267 {
1268 #ifdef HAVE_CYRUS_SASL
1269         sasl_conn_t *ctx = conn->c_sasl_context;
1270
1271         if( ctx != NULL ) {
1272                 sasl_dispose( &ctx );
1273         }
1274
1275         conn->c_sasl_context = NULL;
1276
1277         free( conn->c_sasl_extra );
1278         conn->c_sasl_extra = NULL;
1279 #endif
1280
1281         return LDAP_SUCCESS;
1282 }
1283
1284 int slap_sasl_bind(
1285     Connection          *conn,
1286     Operation           *op,
1287     struct berval       *dn,
1288     struct berval       *ndn,
1289     struct berval       *cred,
1290         struct berval                   *edn,
1291         slap_ssf_t              *ssfp )
1292 {
1293         int rc = 1;
1294
1295 #ifdef HAVE_CYRUS_SASL
1296         sasl_conn_t *ctx = conn->c_sasl_context;
1297         struct berval response;
1298         unsigned reslen = 0;
1299         const char *errstr = NULL;
1300         int sc;
1301
1302 #ifdef NEW_LOGGING
1303         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
1304                 "sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
1305                 conn->c_connid,
1306                 dn->bv_len ? dn->bv_val : "",
1307                 conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech.bv_val,
1308                 cred ? cred->bv_len : 0 ));
1309 #else
1310         Debug(LDAP_DEBUG_ARGS,
1311                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1312                 dn->bv_len ? dn->bv_val : "",
1313                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
1314                 cred ? cred->bv_len : 0 );
1315 #endif
1316
1317
1318         if( ctx == NULL ) {
1319                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
1320                         NULL, "SASL unavailable on this session", NULL, NULL );
1321                 return rc;
1322         }
1323
1324 #if SASL_VERSION_MAJOR >= 2
1325 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1326         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1327 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1328         sasl_server_step( ctx, cred, clen, resp, rlen )
1329 #else
1330 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1331         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
1332 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1333         sasl_server_step( ctx, cred, clen, resp, rlen, err )
1334 #endif
1335
1336         if ( !conn->c_sasl_bind_in_progress ) {
1337                 sc = START( ctx,
1338                         conn->c_sasl_bind_mech.bv_val,
1339                         cred->bv_len ? cred->bv_val : "",
1340                         cred->bv_len,
1341                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1342
1343         } else {
1344                 sc = STEP( ctx,
1345                         cred->bv_val, cred->bv_len,
1346                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1347         }
1348
1349         response.bv_len = reslen;
1350
1351         if ( sc == SASL_OK ) {
1352                 sasl_ssf_t *ssf = NULL;
1353
1354                 *edn = conn->c_sasl_dn;
1355                 conn->c_sasl_dn.bv_val = NULL;
1356                 conn->c_sasl_dn.bv_len = 0;
1357
1358                 rc = LDAP_SUCCESS;
1359
1360                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1361                 *ssfp = ssf ? *ssf : 0;
1362
1363                 if( *ssfp ) {
1364                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1365                         conn->c_sasl_layers++;
1366                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1367                 }
1368
1369                 send_ldap_sasl( conn, op, rc,
1370                         NULL, NULL, NULL, NULL,
1371                         response.bv_len ? &response : NULL );
1372
1373         } else if ( sc == SASL_CONTINUE ) {
1374                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1375                         NULL, NULL, NULL, NULL, &response );
1376
1377         } else {
1378 #if SASL_VERSION_MAJOR >= 2
1379                 errstr = sasl_errdetail( ctx );
1380 #endif
1381                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1382                         NULL, errstr, NULL, NULL );
1383         }
1384
1385 #if SASL_VERSION_MAJOR < 2
1386         if( response.bv_len ) {
1387                 ch_free( response.bv_val );
1388         }
1389 #endif
1390
1391 #ifdef NEW_LOGGING
1392         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
1393                 "slap_sasl_bind: rc=%d\n", rc ));
1394 #else
1395         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1396 #endif
1397
1398
1399 #else
1400         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1401                 NULL, "SASL not supported", NULL, NULL );
1402 #endif
1403
1404         return rc;
1405 }
1406
1407 char* slap_sasl_secprops( const char *in )
1408 {
1409 #ifdef HAVE_CYRUS_SASL
1410         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1411
1412         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1413 #else
1414         return "SASL not supported";
1415 #endif
1416 }
1417
1418 #ifdef HAVE_CYRUS_SASL
1419 int
1420 slap_sasl_setpass(
1421         Connection      *conn,
1422         Operation       *op,
1423         const char      *reqoid,
1424         struct berval   *reqdata,
1425         char            **rspoid,
1426         struct berval   **rspdata,
1427         LDAPControl     *** rspctrls,
1428         const char      **text )
1429 {
1430         int rc;
1431         struct berval id = { 0, NULL }; /* needs to come from connection */
1432         struct berval new = { 0, NULL };
1433         struct berval old = { 0, NULL };
1434
1435         assert( reqoid != NULL );
1436         assert( strcmp( LDAP_EXOP_MODIFY_PASSWD, reqoid ) == 0 );
1437
1438         rc = sasl_getprop( conn->c_sasl_context, SASL_USERNAME,
1439                 (SASL_CONST void **)&id.bv_val );
1440
1441         if( rc != SASL_OK ) {
1442                 *text = "unable to retrieve SASL username";
1443                 rc = LDAP_OTHER;
1444                 goto done;
1445         }
1446
1447 #ifdef NEW_LOGGING
1448         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
1449                 "slap_sasl_setpass: \"%s\"\n",
1450                 id.bv_val ? id.bv_val : "" ));
1451 #else
1452         Debug( LDAP_DEBUG_ARGS, "==> ldbm_back_exop_passwd: \"%s\"\n",
1453                 id.bv_val ? id.bv_val : "", 0, 0 );
1454 #endif
1455
1456         rc = slap_passwd_parse( reqdata,
1457                 NULL, &old, &new, text );
1458
1459         if( rc != LDAP_SUCCESS ) {
1460                 goto done;
1461         }
1462
1463         if( new.bv_len == 0 ) {
1464                 slap_passwd_generate(&new);
1465
1466                 if( new.bv_len == 0 ) {
1467                         *text = "password generation failed.";
1468                         rc = LDAP_OTHER;
1469                         goto done;
1470                 }
1471
1472                 *rspdata = slap_passwd_return( &new );
1473         }
1474
1475 #if SASL_VERSION_MAJOR < 2
1476         rc = sasl_setpass( conn->c_sasl_context,
1477                 id.bv_val, new.bv_val, new.bv_len, 0, text );
1478 #else
1479         rc = sasl_setpass( conn->c_sasl_context, id.bv_val,
1480                 old.bv_val, old.bv_len, new.bv_val, new.bv_len, 0 );
1481         if( rc != SASL_OK ) {
1482                 *text = sasl_errdetail( conn->c_sasl_context );
1483         }
1484 #endif
1485         switch(rc) {
1486                 case SASL_OK:
1487                         rc = LDAP_SUCCESS;
1488                         break;
1489
1490                 case SASL_NOCHANGE:
1491                 case SASL_NOMECH:
1492                 case SASL_DISABLED:
1493                 case SASL_PWLOCK:
1494                 case SASL_FAIL:
1495                 case SASL_BADPARAM:
1496                 default:
1497                         rc = LDAP_OTHER;
1498         }
1499
1500 done:
1501         return rc;
1502 }
1503 #endif